25mV Joule Thief powered by peltier merely using our body heat -Free energy 24/7

[crazycut06]

Hi magpwr,
Nice idea, i too would like to experiment with peltiers, can you try and put a heater coil from the output of your jt to the peltier, and see if you can loop it with its own power?


Regards
Cc
@Mags
Thought it was you who started this thread 

[magpwr]

Hi,

We can use external heat source but it will defeat the meaning of "Free energy" which my circuit was intended for .Circuit output can't generate enough power to heat peltier again.
Peltier are only 50% efficient if used as a cooler.

Although there could be another possibility like using "crystal radio" to tap into "natural radio wave" and broadcast radio wave which may produce in milli volts to power my circuit to boost voltage
to useable level.

[scratchrobot]

Hi,

We can use external heat source but it will defeat the meaning of "Free energy" which my circuit was intended for .Circuit output can't generate enough power to heat peltier again.
Peltier are only 50% efficient if used as a cooler.

Although there could be another possibility like using "crystal radio" to tap into "natural radio wave" and broadcast radio wave which may produce in milli volts to power my circuit to boost voltage
to useable level.

I did not even notice the 25mv, that's very low!
I also have a Peltier somewhere lying around and maybe i can power my crystal with it, your idea to tap into some wave is also nice.
Can you tell me why there are 4 fet's in your circuit?

Thanks

[crazycut06]

Hi,

We can use external heat source but it will defeat the meaning of "Free energy" which my circuit was intended for .Circuit output can't generate enough power to heat peltier again.
Peltier are only 50% efficient if used as a cooler.

Although there could be another possibility like using "crystal radio" to tap into "natural radio wave" and broadcast radio wave which may produce in milli volts to power my circuit to boost voltage
to useable level.

Have you looked at the JT threads? Where gadgetmalls jt circuit 1.5v AA battery can light modified cfl's, christmas lights etc...if your jt is like that maybe its posible?

[magpwr]

Hi,

To Crazycut06,
This joule thief could output around 30v at 1V input. But my version 1.0 joule thief is design for low power/current.

I have already created a high power version but i realise peltier can't produce high current at such a low voltage like body heat.

If you are talking about "ultimate high power joule thief" to run from battery down to below <100mV .Yes it is already made &tested but still in improvement stage.
But that  is reserve for  future  posting version 2.0 but input current is higher at 150mA . I have also created version 3.0 which have certain improvement over 2.0.
The toroid remain the same in any case.

To Scratchrobot,
The reason why i am using 4JFET in parallel is to increase current output.Using 1 fet current consumption is only around 1mA and obvioiusly the output current is lower.THE jfet was not design to handle high current.